Headset



FIG. 1 is a top perspective view of a headset showing our new design;

FIG. 2 is a right side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom elevational view thereof; and,

FIG. 5 is a rear elevational view thereof.

The broken lines to the unclaimed environment form no part of the claimed design. 

The ornamental design for headset, as shown and described. 